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[DAT] (requires LDraw-compatible viewer)
Subject: 
Re: HELP !!! Rotating a cylinder
Newsgroups: 
lugnet.cad
Date: 
Fri, 8 Sep 2000 16:21:25 GMT
Viewed: 
503 times
  
In lugnet.cad, Travis Cobbs writes:

As for lining the two up, I would suggest to first line them up
axis-aligned, and then multiply both matrices by a rotation matrix that
rotates about the shoulder.  Or, if the sphere is positioned just the way
you want it, then rotate about the center of the sphere.  Do you know how to
do this?

no

If not, get it lined up along some axis, and then post what you
have, along with how exactly you want it rotated, and I'll post the rotated
version, along with notes on how I produced it.

--Travis Cobbs (tcobbs@san.REMOVE.rr.com)


2 24 14.8 -16.4 6.1 16.8 -5 6.1
4 16 14.8 -16.4 6.1 16.8 -5 6.1 16.8 -5 -6.1 14.8 -16.4 -6.1
1 14 21.2 -11.2 0 3.15 0 0 0 3.15 0 0 0 3.15 4-8SPHE.DAT
1 14 21.2 -11.2 0 3.15 0 0 0 -3.15 0 0 0 -3.15 4-8SPHE.DAT
0

Travis, I need a cylider, radius 2.8, with a center line perpendicular to the
shoulder plane going from the plane to the center of the sphere.  I hope this
is enough information.

I will not be online until next Monday.  I hope you can help me.
Thanks, Dennis



Message has 2 Replies:
  Re: HELP !!! Rotating a cylinder  [DAT]
 
OK, here is what I came up with: 2 24 14.8 -16.4 6.1 16.8 -5 6.1 4 16 14.8 -16.4 6.1 16.8 -5 6.1 16.8 -5 -6.1 14.8 -16.4 -6.1 1 14 21.2 -11.2 0 0.547 -3.102 0 3.102 0.547 0 0 0 3.15 8-8SPHE.DAT 1 14 21.2 -11.2 0 0.379 -5.909 0 2.147 1.044 0 0 0 2.18 (...) (24 years ago, 8-Sep-00, to lugnet.cad.dev)
  Re: HELP !!! Rotating a cylinder
 
I have responded to this in the lugnet.cad.dev newsgroup, which is a more appropriate location for the response. --Travis Cobbs (tcobbs@san.REMOVE.rr.com) (24 years ago, 8-Sep-00, to lugnet.cad)

Message is in Reply To:
  Re: HELP !!! Rotating a cylinder
 
A few things. First, I thought I'd point out that the code actually has two spheres, SLIGHTLY offset from each other (If you zoom in far enough, you can see the a slight crease). You'll have to remove one of them in order in order to truly line up (...) (24 years ago, 7-Sep-00, to lugnet.cad)

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